i have 600 miles on my 2004 MC. When can i start pushing the engine?

 

I believe after 1,500 miles is a safe way to go.

 

I agree with la_boy. It is probably alright to use cruise and go above 50 after the first 500, but reving and driving with WOT might be advisable only after 1500. :smile:

B

 

Technically, according to the manual break-in is considered anything below 4,000 RMP's and 95 MPH, so you can definitely go above 50 MPH, it's just the RPM's I think you are worreid about...

But yeah, I agree, 1,500 miles is a good bet...

 

acording to the manual the break in period for my MCS was 1200 miles without reving it over 4500 rpm or going over 95mph

 

>>acording to the manual the break in period for my MCS was 1200 miles without reving it over 4500 rpm or going over 95mph

That's what I read in the manual - for the first 1250 miles, stay below 4500 rpm and 95 mph. And absolutely no full throttle - although most engine builders will tell you that low-rpm full throttle bursts are actually HELPFUL in seating the piston rings. FWIW, 1250 miles isn't much of a break-in period. Wait until you hit 5K or even 10K miles, MAN will that motor scream!!!

I think one of the most important practices during break-in is to vary rpm as often as possible (i.e. extended periods at the same rpm isn't so good, but isn't so bad either). I built a motor for my bmw 2002 and broke it in with some full throttle bursts after about 100 miles, kept rpms all over the place, even made it past redline a few times before 500 miles. It's holding up quite well and makes disgusting power...